63 A, 4-pole MCCB for line protection
The Siemens SENTRON 3VA2163-7JQ46-0AA0 is a 4-pole molded case circuit breaker rated for 63 A continuous current, designed for line protection in distribution panels. Its breaking capacity hits 242 kA at 415 V and 440 V, dropping to 187 kA at 500 V and 3.7 kA at 690 V — the 690 V figure is the limit to watch when specifying for 690 V line-to-line systems. At 240 V it clears 330 kA. The breaker holds its 63 A rating flat across the full ambient range from 40 °C to 70 °C, so no derating for elevated panel temperatures.
Panel fit and integration
Dimensions are 181 mm high, 140 mm wide, 86 mm deep — standard 4-pole MCCB footprint for a SENTRON 3VA2 frame. The 86 mm depth means it clears most 200 mm-deep enclosures with room for wiring gutters. Communication function is built in, so it can integrate with a bus system for remote monitoring or trip-data retrieval without an external module. Ground-fault monitoring uses summation-current formation on L+N, which covers TN and TT systems without a separate GF relay.
Breaking capacity by voltage — selectivity planning
The 242 kA at 415 V and 440 V is the same figure — the breaker doesn't distinguish between those voltages. At 500 V it still holds 187 kA, which is enough for most industrial 480 V panels (typically 65–100 kA SCCR). The sharp drop to 3.7 kA at 690 V is a design constraint: this is a 690 V-rated breaker, but its short-circuit capacity at that voltage is low. For 690 V systems with high fault current, step up to a higher-frame 3VA breaker. Insulation voltage is rated at 800 V, so the breaker itself is safe on 690 V lines; the limitation is interruption capability, not dielectric withstand.